drivers/gpu/drm/vc4/vc4_drv.c

   1 /*
   2  * Copyright (C) 2014-2015 Broadcom
   3  * Copyright (C) 2013 Red Hat
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 /**
  11  * DOC: Broadcom VC4 Graphics Driver
  12  *
  13  * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
  14  * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
  15  * configurable display output pipeline that supports HDMI, DSI, DPI,
  16  * and Composite TV output.
  17  *
  18  * The 3D engine also has an interface for submitting arbitrary
  19  * compute shader-style jobs using the same shader processor as is
  20  * used for vertex and fragment shaders in GLES 2.0.  However, given
  21  * that the hardware isn't able to expose any standard interfaces like
  22  * OpenGL compute shaders or OpenCL, it isn't supported by this
  23  * driver.
  24  */
  25
  26 #include <linux/clk.h>
  27 #include <linux/component.h>
  28 #include <linux/device.h>
  29 #include <linux/dma-mapping.h>
  30 #include <linux/io.h>
  31 #include <linux/module.h>
  32 #include <linux/of_platform.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/pm_runtime.h>
  35
  36 #include <drm/drm_atomic_helper.h>
  37 #include <drm/drm_drv.h>
  38 #include <drm/drm_fb_cma_helper.h>
  39 #include <drm/drm_fb_helper.h>
  40 #include <drm/drm_vblank.h>
  41
  42 #include "uapi/drm/vc4_drm.h"
  43
  44 #include "vc4_drv.h"
  45 #include "vc4_regs.h"
  46
  47 #define DRIVER_NAME "vc4"
  48 #define DRIVER_DESC "Broadcom VC4 graphics"
  49 #define DRIVER_DATE "20140616"
  50 #define DRIVER_MAJOR 0
  51 #define DRIVER_MINOR 0
  52 #define DRIVER_PATCHLEVEL 0
  53
  54 /* Helper function for mapping the regs on a platform device. */
  55 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  56 {
  57         struct resource *res;
  58         void __iomem *map;
  59
  60         res = platform_get_resource(dev, IORESOURCE_MEM, index);
  61         map = devm_ioremap_resource(&dev->dev, res);
  62         if (IS_ERR(map)) {
  63                 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
  64                 return map;
  65         }
  66
  67         return map;
  68 }
  69
  70 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
  71                                struct drm_file *file_priv)
  72 {
  73         struct vc4_dev *vc4 = to_vc4_dev(dev);
  74         struct drm_vc4_get_param *args = data;
  75         int ret;
  76
  77         if (args->pad != 0)
  78                 return -EINVAL;
  79
  80         if (!vc4->v3d)
  81                 return -ENODEV;
  82
  83         switch (args->param) {
  84         case DRM_VC4_PARAM_V3D_IDENT0:
  85                 ret = vc4_v3d_pm_get(vc4);
  86                 if (ret)
  87                         return ret;
  88                 args->value = V3D_READ(V3D_IDENT0);
  89                 vc4_v3d_pm_put(vc4);
  90                 break;
  91         case DRM_VC4_PARAM_V3D_IDENT1:
  92                 ret = vc4_v3d_pm_get(vc4);
  93                 if (ret)
  94                         return ret;
  95                 args->value = V3D_READ(V3D_IDENT1);
  96                 vc4_v3d_pm_put(vc4);
  97                 break;
  98         case DRM_VC4_PARAM_V3D_IDENT2:
  99                 ret = vc4_v3d_pm_get(vc4);
 100                 if (ret)
 101                         return ret;
 102                 args->value = V3D_READ(V3D_IDENT2);
 103                 vc4_v3d_pm_put(vc4);
 104                 break;
 105         case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
 106         case DRM_VC4_PARAM_SUPPORTS_ETC1:
 107         case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
 108         case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
 109         case DRM_VC4_PARAM_SUPPORTS_MADVISE:
 110         case DRM_VC4_PARAM_SUPPORTS_PERFMON:
 111                 args->value = true;
 112                 break;
 113         default:
 114                 DRM_DEBUG("Unknown parameter %d\n", args->param);
 115                 return -EINVAL;
 116         }
 117
 118         return 0;
 119 }
 120
 121 static int vc4_open(struct drm_device *dev, struct drm_file *file)
 122 {
 123         struct vc4_file *vc4file;
 124
 125         vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
 126         if (!vc4file)
 127                 return -ENOMEM;
 128
 129         vc4_perfmon_open_file(vc4file);
 130         file->driver_priv = vc4file;
 131         return 0;
 132 }
 133
 134 static void vc4_close(struct drm_device *dev, struct drm_file *file)
 135 {
 136         struct vc4_dev *vc4 = to_vc4_dev(dev);
 137         struct vc4_file *vc4file = file->driver_priv;
 138
 139         if (vc4file->bin_bo_used)
 140                 vc4_v3d_bin_bo_put(vc4);
 141
 142         vc4_perfmon_close_file(vc4file);
 143         kfree(vc4file);
 144 }
 145
 146 static const struct vm_operations_struct vc4_vm_ops = {
 147         .fault = vc4_fault,
 148         .open = drm_gem_vm_open,
 149         .close = drm_gem_vm_close,
 150 };
 151
 152 static const struct file_operations vc4_drm_fops = {
 153         .owner = THIS_MODULE,
 154         .open = drm_open,
 155         .release = drm_release,
 156         .unlocked_ioctl = drm_ioctl,
 157         .mmap = vc4_mmap,
 158         .poll = drm_poll,
 159         .read = drm_read,
 160         .compat_ioctl = drm_compat_ioctl,
 161         .llseek = noop_llseek,
 162 };
 163
 164 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 165         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 166         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 167         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 168         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 169         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 170         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 171         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 172                           DRM_ROOT_ONLY),
 173         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 174         DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
 175         DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
 176         DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
 177         DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
 178         DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
 179         DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
 180         DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
 181 };
 182
 183 static struct drm_driver vc4_drm_driver = {
 184         .driver_features = (DRIVER_MODESET |
 185                             DRIVER_ATOMIC |
 186                             DRIVER_GEM |
 187                             DRIVER_RENDER |
 188                             DRIVER_SYNCOBJ),
 189         .open = vc4_open,
 190         .postclose = vc4_close,
 191         .irq_handler = vc4_irq,
 192         .irq_preinstall = vc4_irq_preinstall,
 193         .irq_postinstall = vc4_irq_postinstall,
 194         .irq_uninstall = vc4_irq_uninstall,
 195
 196         .get_scanout_position = vc4_crtc_get_scanoutpos,
 197         .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
 198
 199 #if defined(CONFIG_DEBUG_FS)
 200         .debugfs_init = vc4_debugfs_init,
 201 #endif
 202
 203         .gem_create_object = vc4_create_object,
 204         .gem_free_object_unlocked = vc4_free_object,
 205         .gem_vm_ops = &vc4_vm_ops,
 206
 207         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 208         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 209         .gem_prime_export = vc4_prime_export,
 210         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 211         .gem_prime_import_sg_table = vc4_prime_import_sg_table,
 212         .gem_prime_vmap = vc4_prime_vmap,
 213         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 214         .gem_prime_mmap = vc4_prime_mmap,
 215
 216         .dumb_create = vc4_dumb_create,
 217
 218         .ioctls = vc4_drm_ioctls,
 219         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 220         .fops = &vc4_drm_fops,
 221
 222         .name = DRIVER_NAME,
 223         .desc = DRIVER_DESC,
 224         .date = DRIVER_DATE,
 225         .major = DRIVER_MAJOR,
 226         .minor = DRIVER_MINOR,
 227         .patchlevel = DRIVER_PATCHLEVEL,
 228 };
 229
 230 static int compare_dev(struct device *dev, void *data)
 231 {
 232         return dev == data;
 233 }
 234
 235 static void vc4_match_add_drivers(struct device *dev,
 236                                   struct component_match **match,
 237                                   struct platform_driver *const *drivers,
 238                                   int count)
 239 {
 240         int i;
 241
 242         for (i = 0; i < count; i++) {
 243                 struct device_driver *drv = &drivers[i]->driver;
 244                 struct device *p = NULL, *d;
 245
 246                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 247                                             (void *)platform_bus_type.match))) {
 248                         put_device(p);
 249                         component_match_add(dev, match, compare_dev, d);
 250                         p = d;
 251                 }
 252                 put_device(p);
 253         }
 254 }
 255
 256 static int vc4_drm_bind(struct device *dev)
 257 {
 258         struct platform_device *pdev = to_platform_device(dev);
 259         struct drm_device *drm;
 260         struct vc4_dev *vc4;
 261         struct device_node *node;
 262         int ret = 0;
 263
 264         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 265
 266         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 267         if (!vc4)
 268                 return -ENOMEM;
 269
 270         /* If VC4 V3D is missing, don't advertise render nodes. */
 271         node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
 272         if (!node || !of_device_is_available(node))
 273                 vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
 274         of_node_put(node);
 275
 276         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 277         if (IS_ERR(drm))
 278                 return PTR_ERR(drm);
 279         platform_set_drvdata(pdev, drm);
 280         vc4->dev = drm;
 281         drm->dev_private = vc4;
 282         INIT_LIST_HEAD(&vc4->debugfs_list);
 283
 284         mutex_init(&vc4->bin_bo_lock);
 285
 286         ret = vc4_bo_cache_init(drm);
 287         if (ret)
 288                 goto dev_put;
 289
 290         drm_mode_config_init(drm);
 291
 292         vc4_gem_init(drm);
 293
 294         ret = component_bind_all(dev, drm);
 295         if (ret)
 296                 goto gem_destroy;
 297
 298         drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
 299
 300         ret = vc4_kms_load(drm);
 301         if (ret < 0)
 302                 goto unbind_all;
 303
 304         ret = drm_dev_register(drm, 0);
 305         if (ret < 0)
 306                 goto unbind_all;
 307
 308         drm_fbdev_generic_setup(drm, 16);
 309
 310         return 0;
 311
 312 unbind_all:
 313         component_unbind_all(dev, drm);
 314 gem_destroy:
 315         vc4_gem_destroy(drm);
 316         vc4_bo_cache_destroy(drm);
 317 dev_put:
 318         drm_dev_put(drm);
 319         return ret;
 320 }
 321
 322 static void vc4_drm_unbind(struct device *dev)
 323 {
 324         struct drm_device *drm = dev_get_drvdata(dev);
 325         struct vc4_dev *vc4 = to_vc4_dev(drm);
 326
 327         drm_dev_unregister(drm);
 328
 329         drm_atomic_helper_shutdown(drm);
 330
 331         drm_mode_config_cleanup(drm);
 332
 333         drm_atomic_private_obj_fini(&vc4->load_tracker);
 334         drm_atomic_private_obj_fini(&vc4->ctm_manager);
 335
 336         drm_dev_put(drm);
 337 }
 338
 339 static const struct component_master_ops vc4_drm_ops = {
 340         .bind = vc4_drm_bind,
 341         .unbind = vc4_drm_unbind,
 342 };
 343
 344 static struct platform_driver *const component_drivers[] = {
 345         &vc4_hdmi_driver,
 346         &vc4_vec_driver,
 347         &vc4_dpi_driver,
 348         &vc4_dsi_driver,
 349         &vc4_txp_driver,
 350         &vc4_hvs_driver,
 351         &vc4_crtc_driver,
 352         &vc4_v3d_driver,
 353 };
 354
 355 static int vc4_platform_drm_probe(struct platform_device *pdev)
 356 {
 357         struct component_match *match = NULL;
 358         struct device *dev = &pdev->dev;
 359
 360         vc4_match_add_drivers(dev, &match,
 361                               component_drivers, ARRAY_SIZE(component_drivers));
 362
 363         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 364 }
 365
 366 static int vc4_platform_drm_remove(struct platform_device *pdev)
 367 {
 368         component_master_del(&pdev->dev, &vc4_drm_ops);
 369
 370         return 0;
 371 }
 372
 373 static const struct of_device_id vc4_of_match[] = {
 374         { .compatible = "brcm,bcm2835-vc4", },
 375         { .compatible = "brcm,cygnus-vc4", },
 376         {},
 377 };
 378 MODULE_DEVICE_TABLE(of, vc4_of_match);
 379
 380 static struct platform_driver vc4_platform_driver = {
 381         .probe          = vc4_platform_drm_probe,
 382         .remove         = vc4_platform_drm_remove,
 383         .driver         = {
 384                 .name   = "vc4-drm",
 385                 .of_match_table = vc4_of_match,
 386         },
 387 };
 388
 389 static int __init vc4_drm_register(void)
 390 {
 391         int ret;
 392
 393         ret = platform_register_drivers(component_drivers,
 394                                         ARRAY_SIZE(component_drivers));
 395         if (ret)
 396                 return ret;
 397
 398         return platform_driver_register(&vc4_platform_driver);
 399 }
 400
 401 static void __exit vc4_drm_unregister(void)
 402 {
 403         platform_unregister_drivers(component_drivers,
 404                                     ARRAY_SIZE(component_drivers));
 405         platform_driver_unregister(&vc4_platform_driver);
 406 }
 407
 408 module_init(vc4_drm_register);
 409 module_exit(vc4_drm_unregister);
 410
 411 MODULE_ALIAS("platform:vc4-drm");
 412 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 413 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 414 MODULE_LICENSE("GPL v2");